On the Record · NorthWestern Energy Group
NorthWestern Energy Group acquisitions, on the record
The businesses NorthWestern Energy Group bought and sold, as its annual reports describe them, with the cash it reported paying for acquisitions each year and every deal filing since 2016.
Deals its annual reports describe
| Business | Deal | When | Value |
|---|---|---|---|
Avista Corporation's 15 percent interest in each of Units 3 and 4 at the Colstrip Generating StationWord for word“The Avista Agreement provides that the purchase price will be $0 and that we will acquire Avista's interest effective December 31, 2025, subject to the satisfaction of the closing conditions contained within the Avista Agreement.” 10-K for 2023 | agreed acquisition | December 31, 2025 | $0 |
NW CorpWord for word“On October 2, 2023, NW Corp and NorthWestern Energy Group completed a merger transaction pursuant to which NorthWestern Energy Group became the holding company parent of NW Corp.” 10-K for 2023 | merger | October 2, 2023 | — |
Avista Corporation's interest in Colstrip Units 3 & 4 (15%, 222 megawatts)Word for word“As previously disclosed, in January 2023 and in July 2024, we entered into definitive agreements, the first with Avista Corporation (Avista) and the second with Puget Sound Energy (Puget), to acquire their respective interests in Colstrip Units 3 & 4 for $0.” 10-K for 2024 | agreed acquisition | January 2023 | $0 |
Puget Sound Energy's interest in Colstrip Units 3 & 4 (25%, 370 megawatts)Word for word“As previously disclosed, in January 2023 and in July 2024, we entered into definitive agreements, the first with Avista Corporation (Avista) and the second with Puget Sound Energy (Puget), to acquire their respective interests in Colstrip Units 3 & 4 for $0.” 10-K for 2024 | agreed acquisition | July 2024 | $0 |
Energy West natural gas utility distribution system and operations from Hope UtilitiesWord for word“In July 2024, we entered into an Asset Purchase Agreement with Hope Utilities to acquire its Energy West natural gas utility distribution system and operations serving approximately 33,000 customers located near Great Falls, Cut Bank, and West Yellowstone, Montana for approximately $39.0 million, subject to certain working capital and other agreed upon closing adjustments.” 10-K for 2024 | agreed acquisition | July 2024 | approximately $39.0 million |
Black Hills CorporationWord for word“Pursuant to the Merger Agreement, at the effective time of the Merger, each share of common stock of NorthWestern issued and outstanding as of immediately prior to closing will be converted into the right to receive 0.98 validly issued, fully paid and non-assessable shares of common stock of Black Hills, par value $1.00 per share (Black Hills Common Stock).” 10-K for 2025 | agreed acquisition | — | 0.98 validly issued, fully paid and non-assessable shares of common stock of Black Hills |
Colstrip Units 3 & 4 ownership interests from Avista Corporation and Puget Sound EnergyWord for word“On January 1, 2026, we acquired an additional 40 percent ownership interest in Colstrip Units 3 & 4.” 10-K for 2025 | acquisition | January 1, 2026 | — |
Deal filings since 2016
- 2026-06-22 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2026-06-02 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2025-11-13 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2025-10-03 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2025-08-19 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2025-05-07 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2025-03-27 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2024-08-02 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2024-04-18 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2024-04-03 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2024-01-02 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
- 2023-12-05 Form 8-K, Item 1.01: Entry into a Material Definitive Agreement
Read from NorthWestern Energy Group’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-02-12. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.